package com.atguigu.cloud.mygateway;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * ClassName:MyGlobalFilter
 * Package:com.atguigu.cloud.mygateway
 * Description:
 *
 * @Author:@郭先森
 * @Create:2025/6/21 - 18:57
 * @Version:v1.0
 */
@Component
@Slf4j
public class MyGlobalFilter implements GlobalFilter, Ordered {
    public static final String BEGIN_VISIT_TIME ="begin_visit_time";//开始调用方法的时间
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //先记录下访问接口的开始时间
        exchange.getAttributes().put(BEGIN_VISIT_TIME,System.currentTimeMillis());

        //返回统计的各个结果给后台
        return chain.filter(exchange).then(Mono.fromRunnable(()->{
            Long beginVisitTime=exchange.getAttribute(BEGIN_VISIT_TIME);
            if(beginVisitTime!=null){
                log.info("访问接口主机："+exchange.getRequest().getURI().getHost());
                log.info("访问接口端口："+exchange.getRequest().getURI().getPort());
                log.info("访问接口URL："+exchange.getRequest().getURI().getPath());
                log.info("访问接口URL参数："+exchange.getRequest().getURI().getRawQuery());
                log.info("访问接口时长："+(System.currentTimeMillis()-beginVisitTime)+"毫秒");
                System.out.println("===================分割线===============================");
                System.out.println();
            }
        }));
    }

    @Override
    //数字越小，优先级越高
    public int getOrder() {
        return 0;
    }
}
